Apparatus for forming concrete floors



Feb. 13, 1934. H. w. R008 APPARATUS FOR FORMING CONCRETE FLOORS Filed March 13, 1950 3 Sheets-Sheet 1 m. i4 1 I v INVENTOR Ji I; "R003 y 1 v J I I I v .5 1

71 's A Z/TORNE y Feb. 13, 1934. w 005 1,947,369

APPARATUS FOR FORMING CONCRETE FLOORS Filed March 15, 1930 3 Sheets-Sheet 2 INVENTO/t 121 WROOS 72115 A TTOKNE Feb. 13, 1934. H. w. ROOS 1,947,360

APPARATUS FOR FORMING CONCRETE FLOORS Filed March 15, 1950 s Sheets-Sheet :5

[N VENTOR 72 119A TTORNE y i as Patented Feb. 13, 1934 UNITED STATES PATENT OFFICE APPARATUS FOR FORMING CONCRETE FLOORS This invention relates to apparatus for forming concrete floor molds, and particularly to apparatus for molding the floor at and around the top of a column or permanent support for the floor.

The principal object of the invention is the provision of forms for molding the thick slab at the head of the column, which are light in weight and which can be quickly assembled in the floor mold and readily adjusted to meet varying conditions.

A further object of the invention is the provision of a .form for a floor mold which can be readily assembled therein at the head of a column when one or more beams or girders frame into the column.

Still another object of the invention .is the provision of an adjustable form for molding the floor around the column head, which can be adjusted to fit against the sides of a beam or girder framing into the column head.

To these and other ends, the invention consists in the construction and arrangement of parts that will appear from the following description when read in conjunction with the accompanying drawings, the novel features being pointed out in the claims following the specification.

In the drawings:

Fig. 1 is a fragmentary plan view of a floor mold showing the construction at the head of a column, and illustrating one embodiment of the invention;

Fig. 2 is an enlarged vertical section of the same taken substantially on line 22 of Fig. 1, and looking in the direction of the arrow at said line;

Fig. 3 is an enlarged inverted plan view of one of the forms shown in Fig. 1;

Fig. 4. is a vertical section taken substantially on line 4- 1 of Fig. .3, and looking in the direction of the arrow at said line;

Fig. 5 is a side elevation of the same;

Fig. 6 is an enlarged inverted plan view of another form shown in Fig. 1;

Fig. 7 is a vertical section taken substantially on line 7-7 of Fig. 5, and looking in the direction of the arrow at said line and Fig. 8 is a similar view showing parts'in another position of adjustment.

Referring" specifically to the drawings, in which similar reference characters refer to the same parts in all the views, 1 represents a plurality of uniform floor forms assembled on shores 2 to form a floor mold. The forms 1 are cut out at their corners to fit around the tops of the shores 2 on which they are temporarily supported. A column or permanent support for the floor is shown, having a circular top or head 3 and framing into the head is a beam mold 4, and a girder mold 5 also framing into the head is shown arranged at substantially right angles to the beam mold.

The beam and girder molds are constructed of beam or girder forms arranged in the floor mold between the floor forms, and are supported on shores '6 having specially constructed heads adapted to lie flush with the side walls of the beam or girder mold and fit in the corners of the adjacent floor forms which are also supported on the shores 6.

Referring to Fig. 1 of the drawings, it will be noted that the space in the floor mold adjacent the beam mold, or between the beam mold and the forms 1, is too narrow for the forms 1, and narrow forms 7 are assembled in these openings to fill in the floor mold. The forms 7 maybe made in all respects like the forms 1 except that they are shorter inone dimension, or they may be adjustable to fit the particular openings in which they are to be used.

As usual in this type of construction, the column flares outwardly beneath the head 3 on which a thick slab of concrete is formed. Said thick slab is molded on forms arranged in the plane of the top of the column head and at a lower level than the plane of the floor forms 1 and '7. Four forms are arranged in the substantially rectangular or square opening, around the top of the column between the beam and girder molds. These are of three different types 8, 9 and 10, each adapted to fit the particular position in which it is used and'adapted to be mounted on the adjacent shores 2 or 6 at its outer corners, as shown in Figs. 1 and 2, and on any suitable supports adjacent the column head. Arranged between the forms 9 and 10 are the beam and girder molds 4 and. 5. Short beam and girder forms 11 and 12 are shown for forming the beam and girder to the top of the column head. These short beam forms may be especially constructed of the required length or they may be made adjustable longitudinally, so that they may be adjusted to the required length.

The forms 8 are constructed of sheet material substantially of the form shown in Fig. 1, being substantially rectangular or square and having the inner part cut away along a curve or circle a? face of the part 25 preferably by welding.

to fit closely against the outer edge of the column head 3. Adjacent its outer edges it has vertical walls 13, see Fig. 2, to the upper edges of which the forms 14 and 15 are secured. The forms 14 and 15 are cut away at their ends to fit around the adjacent shores 2 on which they are supported. In a construction in which there are no beams framing into the head of the column, the entire mold for the thick slab may be formed of the forms 8 in the usual way.

Arranged in the mold for the thick slab between the form 8 and the beams and girders are two forms 9. These forms may be constructed like the forms 8 except that they are shorter along the sides 16 to allow for the beam framing into the column head. In the preferred embodiment illustrated in detail in Figs. 3 to 5 inclusive, 7 and 8, the forms 9 are made to be adjustable so that the same forms may be used with beams orv girders of various horizontal thicknesses and adjusted to fit in the adjacent openings. The forms 9 shown in Fig. 1 are similar in form and construction except that they may be said to be right and left. Each of the forms 9 comprises a body portion 17 preferably constructed of sheet material and has a curved edge at 18 adapted to engage the curved outer edge of the column head. As shown, this curved edge is formed by cutting indentations along the edge and turning them under and welding, thus forming a reinforcement for the inner edge of the form. The form also has a short edge at 19 adapted to fit against one of the short edges of the adjacent form 8, a long edge or side 20 corresponding to the side of the adjacent floor form 1 and an edge or side 21 corresponding to the short side of one of the floor forms 7. The side 21, in the present instance, is made of two parts relatively adjustable, so that the same form can be assembled with beams or girders of different horizontal thicknesses.

If desired, the margin of the body portion 17 may be reinforced by means of flanges 22 preferably secured thereto by welding, and to which the vertical walls 13 may be secured at its outer sides. Other reinforcing bars 23 and 24 may also be secured to the lower side of the body portion preferably by welding, and may extend radially outward from the curved edge,

as shown.

The portion of the form along the edge 21, as previously stated, is made of two relatively adjustable parts, one part 25 being integral with the portion 17, and the other part 26 overlapping the part 25 at one end and movable relatively thereto for adjustment. The reinforcing marginal flange along the sides 19, 20 and 21 is in the form of an angle iron as shown, and extending substantially parallel with the edge 21 is a bar or flange 27 also formed on an angle iron which is secured to the under surface of the part 17 preferably by welding, and extends from a point at or adjacent the inner end of the curved edge 18.

Arranged between the flange 27 and the marginal flange, and substantially perpendicular thereto, is another reinforcing flange 28 formed on an angle iron and secured to the under sur- Spaced from each other and from the bar 27 substantially equal distances, and arranged substantially parallel with the bar 27, are a plurality of bars 29 and 30. Orly two bars 29 and 30 are shown, however, a greaternumber may be employed if required. The bars 29 and 30 are also secured to the under surface of the part 25 preferably by welding.

The part 26 has an angle 31 secured to its lower surface at one end preferably by welding, one part of which forms a downwardly projecting flange 32 at its end. A plurality of bars 33, 34 and 35 are secured at their ends to the angle 31 preferably by welding, and extend across the under surface of the part 26 substantially perpendicular to the flange 32 and parallel to each other. The bars33, 34 and 35 are spaced from each other to correspond with the spacing of the bars 29, 30 and 27 on the part 25, which they overlap at their inner ends. The overlapping portions of the bars 27, 29, 30, and the bars 33, 34 and 35 are provided with openings or slots which are adapted to register with each other for the reception of bolts, whereby the overlapping bars may be secured to each other for retaining the part 26 in its adjusted position on the part 25. By securing the bars 33, 34 and 35 to the angle irons 31 instead of to the under surface of the part 26, the bars are spaced from said surface to provide a clearance for the part 25 when the part 26 is moved thereon for adjustment. By removing the bolts from the overlapping bars 27, 33, 30, 34, and 29, 35, the part 26 is free to be adjusted on the part 25 until the form is of the proper size to fit in between the beam and the adjacent floor form. The vertical walls 13 may connect the outer margins of the form with the forms 14 and 15, whereby it may be assembled in the floor mold.

It will be noted, by reference to Fig. 3 of the drawings, that a small opening may occur at the intersection of the curved side with the inner edge of the part 26. This is conveniently covered or bridged by means of a piece of sheet material such as 38, of suflicient size to overlap the edges of the opening to be supported on the adjacent forms.

The form 10 illustrated in detail in Fig. 6 is similar to the form 9 except that both of its longer sides are adjustable in length. By constructing it with one of its sides adjustable to a length corresponding to the length of the side 20 of the form 9, it may be interchanged with said form in the floor mold, or if both sides are made adjustable to a length corresponding to the length of the side 20, it may also be interchanged with the form 8 in the floor mold.

The form 10 is preferably constructed of sheet material and comprises a body portion 40 having the longer outer sides 41 and 42 arranged at substantially right angles to each other, and inwardly extending shorter sides 43 and 44 connected by the curved side 45 adapted to fit around the top of the column head. By this arrangement, the portion 40 is substantially square except that the inner corner is cut away along the curved side 45. The edges of the sides 41, 42 and 45 may be reinforced by the downwardly projecting flanges 46, 4'7 and 48, preferably secured thereto by welding, and the flanges 46 and 47 may be formed on angle irons, as shown.

Mounted on the lower surface of the part 40 and adjustable thereover is the part 26' constructed in all respects like the part 26 previously described. The part 26 has a plurality of spaced rods or bars 33, 34' and 35 arranged on its under surface, the inner ends of which overlap the outer ends of rods or bars 29 and 30 and the bar 27', the last of which extends inwardly part 26'.

from the reinforcing flange 47. The bars 34' and 35 are secured at their ends to an angle iron 28' and extend across the under surface of the portion 40 but free therefrom to provide a clearance for the part 40. The bars 27', 30, 29, and the overlapping bars 33', 34 and 35 are slotted or provided with openings adapted to register with each other for the reception of bolts, whereby the overlapping bars may be $6- cured to each other to secure the part 26' in its adjusted position on the part 40.

Also adjustably mounted on the part 40 is a part 50 in all respects like the parts 26 and 26'. The part 50 is adjustable along the side 42 of the form, substantially at right angles to the Arranged on the under surface of the part 50 are a plurality of rods or bars 51, 52 and 53 corresponding to the bars 33', 34 and 35' on the part 26, similarly spaced from each other.

and free from the part 50 except at their ends, where they are secured to the angle iron 28". The inner ends of the bars 51, 52 and 53 overlap the outer ends of similarly spaced bars 54, 55 and 56. The bars 54, 55 and 56 are arranged at substantially right angles to the bar 2'7, and are welded to the under surface of the part 40. The overlapping bars 51, 52, 53, and 54, 55 and 56 are each provided with a plurality of openings or slots adapted to register with each other for the reception of bolts, whereby the overlapping bars may be secured to each other for retaining the part 50 in its adjusted position. It will be understood that by removing the bolts from the overlapping bars, the parts 26 and 50 may be independently adjusted on the part 40 to allow for the adjacent beams or girders in the floor mold, and fill the openings between them at the top or head of a column. Between the ends of the curved side 45 and the adjustable sides 26 and 50, small triangular openings occur. These can be conveniently covered by pieces of sheet material 38, as previously described.

Although the invention has been described with reference to a single embodiment thereof, it will be understood that this application is intended to cover such changes or modifications as come within the spirit of the invention or scope of the following claims.

I claim:

1. A form for concrete floor molds at the intersection of a beam and a column head, comprising a body portion substantially rectangular in form but having a corner cut away to form a curvilinear edge, a part adjustable on the body portion between the curvilinear edge and one of its longer sides, a plurality of spaced bars secured at their ends to the under surface of the adjustable part but spaced therefrom at their other ends to provide a clearance for said body portion, a plurality of spaced bars secured to the under surface of said body portion and adapted to overlap said first mentioned bars, and means for securing said overlapping bars to each other for retaining the parts in adjusted position.

2. A form for concrete floor molds at the intersection of a pair of perpendicularly arrangedbeams with a column head, comprising a body portion substantially rectangular in form but having a corner cut away to form an edge corresponding in shape to the form of the column head, adjustable parts on said body portion one at each end of said edge and adjustable at right angles to each other so as to fit spaces between beams of different horizontal thicknesses, each of said adjustable parts comprising a plurality of spaced bars secured at their ends to its under surface but spaced therefrom at their other ends to provide a clearance for said body portion, a plurality of spaced bars secured to the under surface of said body portion and adapted to overlap said first mentioned bars, and means for securing said overlapping bars to each other for retaining the parts in adjusted position.

3. A form for concrete floor molds at the intersection of a beam and a column head, comprising a body portion substantially rectangular in form but having a corner cut away to form a curvilinear edge, apart adjustable on the body portion between the curvilinear edge and one of its longer sides, overlapping bars on said adjustable part and body portion for securing it in adjusted position, floor molds supported directly on shores, and means connecting said body portion and said fioor molds.

HENRY W. ROOS. 

